#!/bin/bash
# arith-loop: script to demonstrate arithmetic operators

finished=0
a=0
printf "a\ta**2\ta**3\n"
printf "=\t====\t====\n"

until ((finished)); do
  b=$((a**2))
  c=$((a**3))
  printf "%d\t%d\t%d\n" "$a" "$b" "$c"
  ((a<10?++a:(finished=1)))
done
